基于布尔偏振编码逻辑代数的高效冗余二进制加法的光学实现

冗余二进制法适合数字光学混合计算机.利用该法可以在常数时间内实现无进位的并行算数和,并建立内在的并行算数单元.本文在分析该方法的基础上,利用布尔偏振编码逻辑代数设计了高效光学冗余二进制加法操作系统.     

双色制导用InGaAs探测器低温特性的研究

制备了平面结InGaAs短波红外探测器,分别测量了其在室温及液氮温区的响应光谱、电流～电压曲线和光生信号及噪声,发现其光生信号与室温测量值相比下降了大约50%.在液氮温区的测试结果表明,短波探测器的峰值响应率为Rvp=2.41(107V/W),峰值探测率Dp*=1.51(1012(cmHz)1/2/W.其透射谱的测量表明该探测器的透射率能够超过80%.这些指标能够满足红外双色探测系统的需求。     

铁电移相器优值研究

基于双周期性电容加载共面波导传输线的移相器结构,系统研究了温度变化对铁电薄膜移相器移相能力、传输损耗的影响.调整温度可以在一定的范围内实现对移相器性能指标的微调.给出了加载因子对移相能力的示意曲线图,并在实验上,借助氩离子刻蚀技术,改变加载因子的大小,使得移相器的优值从原来的13degree/dB提升到23degree/dB.     

Pseudometrics, distances and multivariate polynomial inequalities

We discuss three natural pseudodistances and pseudometrics on a bounded domain in based on polynomial inequalities.     

Post‐Treatment of CH3NH3PbI3/PbI2 Composite Films with Methylamine to Realize High‐Performance Photoconductor Devices

Organometallic halide perovskites have attracted great research interest as light‐active materials for use in optoelectronics. Here, we report a high‐performance photoconductor based on a methylammonium lead iodide (MAPbI₃) film that was prepared from a methylamine‐treated MAPbI₃/PbI₂ perovskite film. An ultrahigh responsivity of 3.6 A W^?1 and detectivity of 5.4×10¹² Jones were obtained for the film under 0.5 mW cm^?2 white‐light illumination. In addition, under 420 nm light irradiation, the film exhibited its highest responsivity and detectivity of 30 A W^?1 and 2.4×10¹⁴ Jones, respectively. The excellent photo‐response performance results from the improved electronic quality and suppressed nonradiative recombination channels of the treated perovskite thin film.     

流动注射化学发光法测定水样中痕量锡

在HCl介质中,KMnO4 甲醛 Sn(Ⅱ)为强化学发光体系,利用流动注射和巯基棉分离技术建立了测定锡的新方法,探讨了发光反应的机理。方法的线性范围为0.1～30μg L,检出限为0.04μg L,对1.0μg L的Sn(Ⅱ)标准溶液连续11次测定的相对标准偏差为2.1%。方法已用于环境水样中痕量锡的测定。     

反相流动注射-化学发光法测定苯胺

在酸性介质中,苯胺与过量亚硝酸盐重氮化,剩余亚硝酸盐快速氧化亚铁氰化钾,生成的铁氰化钾与鲁米诺发生化学发光反应。据此,建立了反相流动注射 化学发光法测定苯胺的新方法。方法的线性范围为0 070～10.0mg L,检出限为0 03mg L,相对标准偏差(n=11,ρ=1.0mg L)为2 0%。方法已用于环境水样中苯胺的测定。     

十八种清热解毒中草药中微量元素的测定

采用原子吸收分光光度法测定了十八种清热解毒中草药中人体必需微量元素含量。结果表明,这些中草药中含有丰富的人体必需微量元素。本方法具有操作简便、快速和准确度高等优点。     

Application of potassium ferricyanide in the spectrophotometric determination of captopril

A novel method for the determination of captopril by speetrophotometer is described in this paper. The experiment is based on the fact that Fe(Ⅲ) is reduced to Fe(Ⅱ) by captopril, then the in situ formed Fe(Ⅱ) reacts with potassium ferricyanide to give the soluble prussian blue at pH 4.00, and its maximal adsorption wavelength (λmax) is 735 nm. Good linear relationship is obtained between the absorbance and the concentration of captopril in the wide range of 0.05-20 μg/mL. The linear regression equation is A = -0.04314 + 0.11423C (μg/mL) with a correlation coefficient R = 0.9998. The detection limit (3a/k) is 0.04 μg/mL, the molar absorption coefficient is 2.5×104 L/mol cm. By mensurating the absorbance of soluble prussian blue, the indirect determination of eaptopril can be obtained. This method has been successfully applied to determination of captopril in pharmaceutical samples.Analytical results obtained are satisfactory.     

Cu（BF4）2，Cu（C3H7C00）2与双（二苯膦基）烷烃配体形成配位化合物的红外光谱

用红外光谱法对二苯基膦系列配体及其分别与Cu(BF4)2和Cu(C3H7C00)2形成的系列配位化合物进行了研究，讨论了谱带的归属和Cu(I)配合物形成前后相关谱带的变化规律，并参照元素分析、X—射线粉末衍射分析和热重分析的结果，讨论了所形成配位化合物的可能的结构模式。